VulnerabilityPublished 17 Sep 2026Updated 19 Oct 2026

CVE-2026-93073: Linux kernel · dax: read holder_ops once in dax_holder_notify_failure()

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in ee1251621d1c7cf3155c6704542cbb358d799968 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in ee1251621d1c7cf3155c6704542cbb358d799968, eb412f80311fc7ab6eb3203091a3fe59a5e9fd30, 1661b9bf78def01a8c96409569772d9b2592f4ba +3

Exploitation evidence

Disclosed: evidence found.
CVE published 17 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 8012b866085523758780850087102421dbcce522, < ee1251621d1c7cf3155c6704542cbb358d799968	Fixed in ee1251621d1c7cf3155c6704542cbb358d799968
LinuxLinux	Affected ≥ 8012b866085523758780850087102421dbcce522, < eb412f80311fc7ab6eb3203091a3fe59a5e9fd30	Fixed in eb412f80311fc7ab6eb3203091a3fe59a5e9fd30
LinuxLinux	Affected ≥ 8012b866085523758780850087102421dbcce522, < 1661b9bf78def01a8c96409569772d9b2592f4ba	Fixed in 1661b9bf78def01a8c96409569772d9b2592f4ba
LinuxLinux	Affected ≥ 8012b866085523758780850087102421dbcce522, < 7ae9d15bdcde0f2955ae13b6a95587f9e23b2359	Fixed in 7ae9d15bdcde0f2955ae13b6a95587f9e23b2359
LinuxLinux	Affected ≥ 8012b866085523758780850087102421dbcce522, < 6a37acecc7c29136235cbc446a1b89e81414344b	Fixed in 6a37acecc7c29136235cbc446a1b89e81414344b
LinuxLinux	Affected ≥ 8012b866085523758780850087102421dbcce522, < 0a42180d5410c98829ee72d1d426fb7faf9e6873	Fixed in 0a42180d5410c98829ee72d1d426fb7faf9e6873

Description

In the Linux kernel, the following vulnerability has been resolved: dax: read holder_ops once in dax_holder_notify_failure() dax_holder_notify_failure() reads dax_dev->holder_ops twice without READ_ONCE() -- once for the NULL check and once for the indirect notify_failure() call. A concurrent fs_put_dax() can clear holder_ops between the two reads, so the check can observe a non-NULL pointer while the call dereferences NULL. (kill_dax() also clears holder_ops, but only after synchronize_srcu(), so it cannot race a reader that is inside dax_read_lock(); fs_put_dax() does no such synchronization.) Fetch holder_ops once into a local with READ_ONCE() so the NULL check and the indirect call observe the same value.

References

Community reviews

Loading reviews…